The Perfect Audience PHP SDK by Baptiste Pernet allows API interaction to integrate retargeting features into web applications. Retargeting helps analysts to monitor which users can return to websites to increase sales. Resources include usage, that shows how to obtain a report status with few lines of code.
Google has just announced that over 40 new metrics and dimensions have been added to the Google Analytics API. The new data points can be queried using the Core Reporting API and allow developers to create reports similar to those found in the Google Analytics Web interface.